5-inch FPV freestyle motor
EMAX ECO 2207
EMAX’s original ECO motor in the 2207 size: 12N14P, 31.5 g without leads, a hollow steel shaft in 9 × 4 mm bearings, and 1,880 g of max thrust on 6S by EMAX’s own figure (1900KV).
- 5-inch freestyle
- 6S (1700KV, 1900KV) or 4S (2400KV)
- 5 to 5.5-inch props
The spin is an illustration: the model turns at 1/600 of the no-load speed, and it is a generic 2207 motor drawn from EMAX’s published sizes, not its exact design. No-load speed is KV × 22.2 V, a nominal pack for this version. EMAX publishes no bench data for it.
- Weight
- 31.5 g
- without leads; the 2400KV’s box label gives 31.6 g
Plain links: we earn nothing from them.
What you get
1,880 g on 6S
EMAX’s box label gives the 1900KV 1,880 g of max thrust on 6S with a 5-inch prop, and the 2400KV 1,600 g on 4S.
31.5 g
EMAX lists 31.5 g without leads (31.6 g on the 2400KV’s box label).
Source: EMAX product page, EMAX 2400KV box label
Hollow shaft, 9 × 4 mm bearings
EMAX’s ECO series runs a hollow steel shaft in 9 × 4 mm steel bearings, which EMAX calls larger and more durable, inside a new lightweight bell.
Source: EMAX ECO infographic
Multi-strand windings
Multi-strand windings in a copper alloy of EMAX’s own design.
Source: EMAX ECO infographic
What to pair it with
Our reading of EMAX’s numbers, so your build matches what the motor was tested with.
- Props
- EMAX lists 5 to 5.5-inch props; the 1900KV’s box label names a 5-inch prop. (EMAX product page, EMAX 1900KV box label)
- Battery
- 3S–6S for the 1700KV and 1900KV, 3S–4S for the 2400KV. EMAX gives the 1900KV’s max thrust on 6S and the 2400KV’s on 4S. (EMAX product page, EMAX 1900KV box label, EMAX 2400KV box label)
- Frame
- EMAX does not give the hole pattern for this motor; M3 screws in 6 mm and 7 mm lengths and an M5 nylock nut come in the box. (EMAX 1900KV box label, EMAX 2400KV box label)
Where to buy
- EMAXthe maker’s global store (every KV was listed as out of stock)$21.54seen Oct 19, 2026Visit
Plain links, not affiliate links. Prices change; the store’s page has the current one.
Full specs
| Spec | Value | Source |
|---|---|---|
| KV | 1,900 rpm/V (also 1700KV and 2400KV) | EMAX product page |
| Stator | 22 × 7 mm (2207) | EMAX product page |
| Configuration | 12N14P (12 stator slots, 14 magnet poles) | EMAX product page, EMAX 1900KV box label |
| Battery | 3S–6S LiPo (1700KV, 1900KV); 3S–4S (2400KV) | EMAX product page, EMAX 1900KV box label, EMAX 2400KV box label |
| Weight | 31.5 g (without leads; the 2400KV’s box label gives 31.6 g) | EMAX product page, EMAX 1900KV box label |
| Dimensions | φ27.45 mm, 32.6 mm long | EMAX product page, EMAX 1900KV box label |
| Shaft | Hollow steel, M5 prop thread (CW); 4 mm through the bearings | EMAX product page, EMAX ECO infographic |
| Bell | Machined aluminium, which EMAX calls aerospace-grade | EMAX ECO infographic |
| Bearings | 9 × 4 mm steel bearings | EMAX ECO infographic |
| Winding | Multi-strand, in a copper alloy EMAX designed | EMAX ECO infographic |
| In the box | 5 × M3×7 mm and 5 × M3×6 mm screws; an aluminium M5 nylock nut; a washer and screw for the shaft | EMAX 1900KV box label, EMAX 2400KV box label |
Inside the motor
A brushless outrunner: the coils stand still in the middle and the magnets spin around them. From the top down:
- Shaft. Hollow steel, M5 prop thread (CW); 4 mm through the bearings. (EMAX product page, EMAX ECO infographic)
- Bell. Machined aluminium, which EMAX calls aerospace-grade. (EMAX ECO infographic)
- Stator. The coils are wound on a stack of thin steel laminations: 22 × 7 mm (2207). (EMAX product page)
- Winding. Multi-strand, in a copper alloy EMAX designed. (EMAX ECO infographic)
- Bearings. 9 × 4 mm steel bearings. (EMAX ECO infographic)
How fast it spins
KV is the motor’s no-load speed per volt. With nothing on the shaft, the 1900KV version reaches about these speeds; a prop loads the motor and brings it down, typically to around 70–75% of these figures at full throttle.
| Battery | Volts | No-load rpm (KV × V) | Electrical frequency | ESC steps per second |
|---|---|---|---|---|
| 4S nominal | 14.8 | 28,120 | 3,281 Hz | 19,684 |
| 4S full | 16.8 | 31,920 | 3,724 Hz | 22,344 |
| 6S nominal | 22.2 | 42,180 | 4,921 Hz | 29,526 |
| 6S full | 25.2 | 47,880 | 5,586 Hz | 33,516 |
A 14-pole rotor has 7 pole pairs, so every turn of the shaft is 7 electrical cycles, and a six-step ESC switches the phases 42 times per turn.
About the 3D model
A generic outrunner drawn from EMAX’s published sizes: the 22 × 7 mm stator, 27.45 mm bell, 5 mm shaft and 12 teeth and 14 magnets. Anything EMAX doesn’t publish is typical for a motor this size, and the bell’s spoked top, the base and the inside are a generic design, not this motor’s. The colours are read off the maker’s product photos. There are no logos or markings: it is our drawing, not the maker’s.
Sources
- EMAX: ECO Series 2207 3-6S 1700KV 1900KV 2400KV Brushless Motor (product page on EMAX’s global store, with its spec list). Retrieved Oct 19, 2026.
- EMAX: ECO2207-1900KV box label, with its specs and the parts in the box (product photo on EMAX’s product page). Retrieved Oct 19, 2026.
- EMAX: ECO2207-2400KV box label, with its specs and the parts in the box (product photo on EMAX’s product page). Retrieved Oct 19, 2026.
- EMAX: ECO Series infographic (image on EMAX’s ECO 2306 product page; it describes the whole ECO series, and the copies the ECO 2207 page links on EMAX’s old emax-usa.com site no longer load). Retrieved Oct 19, 2026.
